| 摘要 |
PROBLEM TO BE SOLVED: To provide a cutting tool capable of providing a worked surface having the uniform roughness and the shape of high accuracy by using a linear tool having an edge of the shape same as the surface shape of a workpiece when observed from the advance direction of the tool inclined at a specific angle to the advance direction of the tool. SOLUTION: A cutting tool 15 is provided with the desired shape of an edge observed from the tool advance direction P when the tool is inclined by a predetermined angle 90+θdeg. to the tool advance direction P in the cutting work of a workpiece 8 by a shaping method without turning. Concretely the contour shape projected to the cross section orthogonal to the working point focus, of the cutting edge contour 16 is formed into the elliptical shape with a circular arc of radius of curvature R of high accuracy. This cutting tool 15 is straightly moved on the workpiece 8 in the tool advance direction P while inclined by an angle 90+θdeg. to the tool advance direction to cut the workpiece 8. Whereby the worked surface can be prevented from being scratched by chips and the shape of high accuracy can be formed.
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